Coupling connection for pump rods



y 2, 1 1 .A. L. Lisew 219.664

COUPLING CONNECTION FOR PUMP RODS Original Filed June- 28, 1924 WITNESSES Y INVENTOR ATTORNEYS Patented July 2, 1929. v p I UNITED PATENT oFFi'ca nngrr un LEE LIoN, or ron'rs'roo ToN, rnxns.

COUPLING CONNECTION ron PUMP Eons.

Original application filed June 28, 1924, Serial No. 722,996. Divided and this application filed. March 16,

I 1925. Serial No. 15,994.

My invention relates to improvements in which will abut the lower end of the thimble coupling connections fol-pump rods, andit when the nut 9 has been turned on the rod 3 consists in the combinations, constructions against the thimble. Obviously, the flanges and arrangements herein described and 8 and 10 may be Washers separate from the 5 claimed. nuts with which they are associated.

The present applicati n, is a vi i f y A cross head 27 is carried at the u er end pending application Serial No. 7 22,996 filed of a pair of pitmans 28. The cross head 27 June 28, 1924, for Coupling connection for in l des an elongated body having axially pump rods. aligned reduced portions 29 at its opposite 10 An object of the invention is the pr V1S1 ends. Shoulders as indicated at 30 thus are of simple, reliable and quickly and easily adprovided at the inner ends of the reduced justable means for connecting the upper end portions 29. The reduced end portions 29 portion of a pump or sucker rod releasably to are circular in cross sectional contour and the vertically reciprocating part of a pumpconstitute journal pins which are adapted to ]5 ing jack. extend through openings 31 in the upper end A further object of the invention is the proportions of the pitmans 28. The pitinans are vision of a coupling connection of the characretained on the reduced end portions 29 by the ter described which comprises elements enshoulders 30 and by washers 33 which are gaged adjustably with each other so that the held against the outer faces of the,upper end 0 effective length of the pump rod can be varied. portions of. the pitmans 28 by cotter pins 32 Other objects and advantages of the invenor like fastening devices. The intermediate tion will be apparent from the following deportion of the body of the cross head is bent scription, considered in conjunction with the laterally along the arc of a circleto provide accompanying drawings, in which a section 34 of a clamp. A cap for cooperat- 7 25 Figure 1 is a fragmentary view, partly in ing with the body: of the cross head has an vertical section and partly in side elevation intermediate portion bent laterally along the showing a coupling connection embodying are of a circle to provide a clamping section the invention in positionto connect a pump 35 which is complemental to the section 34 rod with a pumping ack, and and is adapted to cooperate with the latter to so 30 Figure 2 is a plan sectional view of the embrace the thimble 6. The cap 35 also in structure exhibited in Figure 1. eludes attaching ends 36 which may be de- In the drawings, the numeral 1' designates taehably secured to the body of the cross the upper end portion of a well casing. The head by suitable fastening devices, such as upper end portion 2 of a pump or sucker rod the bolts and nuts indicated at 37. The cross 85.

35 which is vertically reciprocable in the well head 27 thus is adapted to be secured to the casing is connected by a union 5 to a rod 3. thimble 6 between the nuts 9 and 7. Verti- The upper end portion of the rod 3 is procal reciprocation of the cross head then will vided with screw threads as indicated at 4. cause vertical reciprocation of the pump or The rod 3 is held rigid with the pump or sucker rod 2. The thimble 6 is adjustable on .40 sucker rod by means of the union 5 and may the rod 3 and therefore the effective length be considered an extension to the pump orof thesucker rod can be varied within limits. sucker rod. The work of connecting the rod 3 with'the A thimble 6 surrounds the rod 3 and is driving mechanism of the pump jack, which joined integrally or othewise at its upper end includes the pitmans 28, therefore can be ac- 45 to a flanged ad usting nut 7 which is in encomplished by the workman quickly and easigagement with the threads 4. The flange on 1y without the use of any special tools.

the nut 7 is indicated at 8 and is at the lower Obviously, the invention is susceptible of end of the nut and therefore at the upper end embodiment in forms other than that illus of the thimble. A jam nut 9 in engagement trated in the accompanying drawings and I with the threads; of the rod 3 below the therefore consider as my own all such modithimble 6 has a flange 10 at its upper end fications and adaptations of the form of the device herein illustrated and described as taining nuts mounted on the threaded por- 10 fairly fall Within the scope of the appended tion of said rod above and below said thimclaim. ble, and flange elements of greater diameter I claim than said thimble and abutting the same at In a coupling connection of the character its upper and lower ends, and maintained described, a pump rod threaded at its upin position by said nuts, and means at the 15 per end, a thimble having a smooth bore outer ends of the cross head for connection and slidable on said pump rod, and a sepawith pitmans. rable cross-head embracing said thimble, re- ARTHUR LEE LIGON. 

